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B. J. STEARNS.

I Sash Fastener. No. 238,727. Patented March 8,1881.

AZ E J @QLLQZW/ I aw f f IINHED STATES PATENT OFFICE.

EDWARD J. STEARNS, OF EASTON, ASSIGNOR OF ONE-HALF TO GEORGE H. ROGERS,OF BALTIMORE, MARYLAND.

SASH-FASTENER.

SPECIFICATION forming part of Letters Patent No. 238,727, dated March 8,1881.

Application filed December 16, 1880. (ModeL) To all whom it may concernBe it known that I, EDWARD J. STEARNS, of Easton, in the county ofTalbot and State of Maryland, have invented certain Improvements inSash-Locks, of which the following is a specification; and I do herebydeclare that in the same is contained a full, clear, and exactdescription of my said invention, reference being had to theaccompanying drawings, and to the letters of reference marked thereon.

This invention relates to certain improvements in that class ofsash-locks in which an eccentric is secured by means of a screw to thesash, with its edge in contact with the sashbead; and it consists incombining with an eccentric, placed as described, and the sash-bead, atapered strip, which is located between the said parts, with its smallerend toward the upper part of the window.

In the further description of my said invention which follows, referenceis made to the accompanying drawings, forming a parthereof, and inwhich- Figure I is a front view of a window frame and sash provided withmy improved lock. Figs. II, III, and IV are details of the invention onan enlarged scale.

Similar letters of reference indicate similar parts in all the views.

A is the window-frame, and B the sash. G is the sash-bead, and D thetapered strip, secured to the bead G in any suitable manner.

- E is an eccentric, fastened to near the bottom of the sash B by meansof a screw, to. The eccentric has a circular slot, 1), concentric withthe hole 0, which, in connection with a stop, (1, allows of a limitedcircular movement of the device. The eccentric has a finger-piece, 0,whereby it may be turned so as to clear the 0 tapered strip D, as willbe readily understood.

The finger-piece is also used as a weight toinfluence the full part ofthe eccentric toward the tapered strip. The tapered strip extendsdownwardly to a point where it will come in contact with the peripheryof the eccentric when the window-sash is down, as shown in Fig. II, anda lock is thereby formed which prevents the opening of the sash, exceptby first turning the eccentric in the directiouindicated by the arrow.

The object in tapering the strip D is to increase the friction betweenthe said strip and the eccentric independently of that produced by theturning of the said eccentric as the window-sash is lowered, and theefficiency of 5 the device is thereby greatly increased. It is obviousthat the same effect is produced by having a tapered sash-bead facedwith a strip of metal of uniform thickness, or a tapered bead without afacing-strip; but the tapered strip is preferred, as it may be sold withthe eccentric to form a complete lock, and can be applied to anysash-bead now in use.

I am aware that it is not new to use an eccentric secured to awindow-sash as a lock, and also that a strip having an inclined surfacehas been used as an element in sash-locks but I am not aware that thetwo devices have been combined in the manner and for the purposehereinbefore described.

I therefore claim as my invention- A sash-lock consisting of theeccentric E and tapered strip D, when combined and applied to awindow-sash and a frame substantially as herein specified.

EDWARD J. STEARNS.

Witnesses:

D. R. D. OHEEsUM, EDGAR J. HULsE.

